html,body{
    width: 100%;
    height:100%;
    padding: 0;
    margin: 0;
}
nav{
    height: 50px;
    line-height: 50px;
    padding-left: 20px;
    background-color: #3b3f54;
    font-size: 25px;
    color: white;
    margin-bottom: 60px;
}
nav:hover{
    color: antiquewhite;
 }

main{
    width: 80%;
    margin: auto;
}
.btn{
    margin-right: 10px !important;
}
/*
#items{
    display: flex;
    width: 100%;
    flex-wrap: wrap;
    justify-content: flex-start;
}
.item{
    height: 250px;
    width: 220px;
    margin: 20px;
    flex-basis: auto;
    padding: 20px 10px 5px 10px;
    background-color: #90caf9;
}
.item>div{
    background-color: #009688;
    width: 100%;
    height: 100%;
    text-align: center;
    font-size: 30px;
}*/